This is Faygo's classic Strawberry soda. I enjoyed this a lot as a kid, but have grown out of it a bit. It is very sugary and almost has a bit of a plastic-like aftertaste (even as a kid, I imagined I was drinking a liquefied red balloon. But I liked it!) You can taste a berry like taste, but it's not strawberry enough for me. I still drink it from time to time, but it's also a flavor I can easily pass.
Man I still love me a Redpop every now and then! When my grandfather wasn't drinking a PBR he was drinking a Redpop! I grew up on the stuff (another Michigander here for those who didn't know), and haven't gotten tired of it yet. In fact, I tried Sunkist strawberry soda, and didn't like it because it was too sweet, and didn't taste like Redpop. I think Redpop also has a bit of a cream soda flavor underneath that I really enjoy, and that other strawberry soda doesn't have.
I think out of all the flavors you have listed above I like Redpop and Rock N Rye the best, although I haven't tried Cotton Candy, Moon Mist Blue, or Candy Apple yet. My daughter has tried the Cotton Candy and really enjoyed it, but I'm guessing its going to be way too sweet for me, plus I'm not a fan of cotton candy in general.
As far as the Coke vs Pepsi thing someone mentioned, I'm Pepsi all the way. I can get their Real Sugar stuff much more readily than I can a glass bottle of Mexican Coke, and Pepsi isn't quite as sweet as Coke, which I like. I also like the 1893 Pepsi Cola; its actually less sweet than normal Pepsi, but has a nice bite that I like.
Maybe we need to do an Atari.io Pepsi Challenge at some point, remember that?